You have a right to appeal a fine, you’ll need to do so with the company or municipality that issued it. The contact details are usually provided on the fine itself, typically at the bottom or on the back.
Please note, that the parking operator will review the circumstances of the case, and appeals may be declined — especially if the fine resulted from a user mistake (such as incorrect vehicle details, selecting the wrong parking zone, or exceeding the paid time).
Each case is assessed individually, and the final decision rests with the parking operator.